<template>
    <div>
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!--卡片视图-->
        <el-card>
            <el-row>
                <el-col>
                    <el-button type="primary">添加角色</el-button>
                </el-col>
            </el-row>
            <!--角色列表区-->
            <el-table :data="rolelist" border stripe>
                <!--展开列-->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        
                        <el-row 
                        :class="['bdbottom', i1 === 0 ? 'bdtop' : '','vcenter']"
                        v-for="(item1, i1) in scope.row.children" 
                        :key="item1.id">
                            <!--渲染一级-->  
                            <el-col :span="5">
                                <el-tag
                                closable
                                @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!--渲染二级和三级-->  
                            <el-col :span="19">
                                <el-row
                                :class="[i2 === 0 ? '' : '','vcenter']"
                                v-for="(item2, i2) in item1.children"
                                :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag 
                                        type="success"
                                        closable
                                        @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag
                                        type="warning"
                                        v-for="(item3, i3) in item2.children"
                                        :key="item3.id"
                                        closable
                                        @close="removeRightById(scope.row, item3.id)">
                                            {{item3.authName}}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>  
                        
                    </template>
                </el-table-column>
                <!--索引列-->
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column lable="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button 
                        size="mini" 
                        type="primary" 
                        icon="el-icon-edit">编辑</el-button>
                        <el-button 
                        size="mini" 
                        type="danger" 
                        icon="el-icon-delete">删除</el-button>
                        <el-button 
                        size="mini" 
                        type="warning" 
                        icon="el-icon-setting"
                        @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>
        <!--分配权限对话框-->
        <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="50%"
        @close="setRightDialogClosed">
            <!--树型-->
            <el-tree 
            :data="rightslist" 
            :props="treeProps" 
            show-checkbox 
            node-key="id" 
            default-expand-all
            :default-checked-keys="defkeys"
            ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取消</el-button>
                <el-button type="primary" @click="allotRights">确定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return{
            //所有角色列表数据
            rolelist:[],
            //控制分配权限
            setRightDialogVisible:false,
            //所有权限列表
            rightslist:[],
            //树型控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            //默认选中节点id值
            defkeys:[],
            //当前即将分配权限id
            roleId:''
        }
    },
    created(){
        this.getRolesList()
    },
    methods:{
        async getRolesList(){
            const {data:res} = await this.$http.get('roles')
            if(res.meta.status !== 200){
                return this.$message.error('获取角色列表失败')
            }
            this.rolelist = res.data;
        },
        async removeRightById(role, rightId){
            const confirmResult = await this.$confirm('此操作将永久删除该文件','提示',{
                confirmButtonText:'确定',
                cancelButtonText:'取消',
                type:'warning'
            }).catch(err => err)
            if(confirmResult !== 'confirm'){
                return this.$message.info('取消删除')
            }
            const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if(res.meta.status !== 200){
                return this.$message.error('删除权限失败')
            }
            role.children = res.data
        },
        //分配权限
        async showSetRightDialog(role){
            this.roleId = role.id
            //获取权限数据
            const {data:res} = await this.$http.get('rights/tree')
            if(res.meta.status !== 200){
                return this.$message.error('获取权限数据失败')
            }
            this.rightslist = res.data;
            //递归获取三级节点id
            this.getLeafkeys(role, this.defkeys)
            this.setRightDialogVisible = true;
        },
        //通过递归形式获取角色下所有三级权限id保存defkeys数组
        getLeafkeys(node, arr){
            //如果当前node节点不包含children属性，是三级节点
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item => this.getLeafkeys(item, arr))
        },
        //监听分配权限对话框关闭事件
        setRightDialogClosed(){
            this.defkeys = []
        },
        //点击为角色分配权限
        async allotRights(){
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr = keys.join(',')
            const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`, {rids:idStr})
            if(res.meta.status !== 200){
                return this.$message.error('分配权限失败')
            }
            this.$message.success('分配权限成功')
            this.getRolesList()
            this.setRightDialogVisible = false
        }
    }
}
</script>

<style lang="less" scoped>
.el-tag{
    margin:7px;
}
.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>